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Freeman Compression seal gasket Model 30 (30" / 762 mm)
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Deck hatches & spare partsSpare Parts & MaintenanceSpare Parts – Square and Rectangular HatchesModel 3636 (36" x 36")

Spare Parts for Freeman Marine Model 3636 Square Deck Hatches (36" x 36" / 914 x 914 mm)

Welcome to Bövik Marin AB – authorized European supplier of genuine factory replacement parts for Freeman Marine Model 3636 square cast deck hatches. Offering a massive 36 x 36 inch (914 x 914 mm) clear opening, Model 3636 is Freeman's largest square deck closure, engineered for heavy machinery spaces, engine and pump rigging, cargo transfer, and certified personnel transit across cargo vessels, trawlers, tugs, research ships, and work barges.

Model 3636 (Series 2428 lift-out / Model 3636K and Series 2468 hinged / Model 3636-HK) is built with Freeman's heavy-weather knife-edge sealing system. The machined perimeter knife-edge rim and integrated coaming drainage gutter effectively capture and route green-water runoff away from below-deck compartments. Mechanically, a central 4-hole cam hub synchronizes four heavy-duty 17.50-inch dog arms to deliver balanced, powerful perimeter clamping force in under a quarter-turn via the flush deck handle or inside emergency escape handle.

Below you will find all genuine mechanical and elastomeric components required for scheduled maintenance, survey overhauls, and complete mechanism rebuilds for Model 3636:

Model 3636 Component Directory (Featured Items Below):

1. Sealing System & Gaskets • Knife-Edge Gasket aluminum ring (Part no. 9813-2006)
• Knife-Edge Gasket steel ring (Part no. 9835-2004)
Hollow D-profile neoprene elastomer (914x914 mm).
2. Dogging Mechanism & Arms • Aluminum Dog Arm 17.50" (Part no. 0211-2026)
• 4-Hole Cam Hub (Part no. 0011-2002)
• Optional: 316 S/S stainless dog arms
3. Actuation & Drive Shaft • Flush Deck Handle 316 S/S
• Handle Spindle & Roll Pins (15"+ standard)
• Inside Escape Handle Assemblies
4. Center Bushing & Hardware • Universal Bushing Overhaul Kit (Part no. 0031-2204)
• Cam Buttons / Wear Pads (Part no. 0621-2004)
• Nylon Thrust Washers (Part no. 0413-2005)

Technical Guide: Maintenance and Component Specification for Model 3636 Square

The square geometry of Freeman Model 3636 (Series 2428 & 2468) provides the largest available access dimension in Freeman's cast hatch portfolio. Sealing and dogging a deck closure across a 914 x 914 mm span under heavy green-water sea states imposes immense structural loads on the mechanical linkage, making factory-original components vital for maintaining watertight integrity.

1. Knife-Edge Gasket Specification: Aluminum vs. Steel Coaming

The coaming on Model 3636 features a machined knife-edge rim flanked by a deep perimeter drainage gutter. The replacement gasket is a hollow D-profile marine neoprene elastomer designed to seat securely into the cover channel:

  • Aluminum Coamings (Part no. 9813-2006): Precision-molded gasket tailored for Freeman 3636 aluminum coamings. Compatible with both lift-out covers (3636K) and hinged variants (3636-HK).
  • Steel Coamings (Part no. 9835-2004): Specifically profiled with adjusted base width for Freeman steel weld-in rings. Engineered to endure continuous deck vibration and heavy green-water sea states.

2. 4-Arm Kinematics with 17.50" Dog Arms

Model 3636 operates via Freeman's central 4-hole marine aluminum cam hub (Part no. 0011-2002) and four heavy-duty 17.50-inch aluminum dog arms (445 mm, Part no. 0211-2026). Because the hatch spans 914 x 914 mm, these extended arms reach out symmetrically to all four edges to provide balanced, perimeter clamping force. During scheduled maintenance, inspect dog arms for straightness and renew nylon cam buttons (Part no. 0621-2004) to ensure smooth travel across the hub tracks.

3. Center Bushing & Spindle Sealing

Moisture weeping beneath the flush deck handle indicates worn spindle O-rings. Model 3636 utilizes Freeman's heavy-duty Universal Center Bushing Overhaul Kit (Part no. 0031-2204), containing a marine-grade sleeve bushing, dual O-rings, and stainless roll pin. Always coat O-rings with waterproof marine grease during reassembly.

Need a Complete New Hatch Assembly or Replacement Deck Coaming?

If your coaming has suffered structural damage or you are engineering a new machinery access opening, explore complete hatch assemblies and genuine factory coamings:

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